JPS6144280Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder drive device with a simplified mechanism.

In order to reduce the cost and weight of a tape recorder, a single motor is used for fast forwarding and rewinding. However, since the directions of rotation are different for fast forwarding and rewinding, such a tape recorder requires a rotating body for fast forwarding and a rotating body for rewinding, making the mechanism complicated.

Therefore, the present invention utilizes the fact that the direction of the belt that transmits the rotational force of the motor to the flywheel is opposite in the going direction and the returning direction, so that fast forwarding and rewinding can be performed with one rotating body. The present invention provides a drive device for a tape recorder.

The present invention will be explained below with reference to the drawings. 1 is a motor having a rotating shaft 2; 3 is a flywheel connected to the rotating shaft 2 of the motor 1 through a belt 4, and has a capstan (not shown); 5 is a take-up reel stand rotatably attached to the shaft 6; 7;
is a supply reel stand rotatably attached to the shaft 8. The shaft 6 is mounted on a leaf spring 10 mounted on a fixed plate 9, and the shaft 8 is mounted on a sub-chassis 12 mounted on a chassis 11. 1
A gear roller 3 is installed coaxially with the take-up reel stand 5, and is in contact with the take-up reel stand 5 through a friction material 14, and one side 4a of the belt 4 is fitted into a groove 15 around the circumference. . Reference numeral 16 denotes a movable gear roller provided on a shaft 18 on a movable plate 17 that is moved in conjunction with a rewind lever (not shown) or a fast forward lever (not shown), and a groove 19 on the outer periphery is different from that of the belt 4. The sides 4b face each other so as to fit together. Further, the tip of the shaft 18 is located in the recess 20 of the leaf spring 10.

Next, the operation of the tape recorder drive device of the present invention will be explained.

First, to perform recording or playback, press the record or play button. Then, the motor 1 rotates, and the flywheel 3 which is interlocked with the motor 1 by the belt 4
Rotate. This causes the capstan to rotate, pinch the tape together with a pinch roller (not shown), and drive the tape. At this time, the gear roller 13 is brought into contact with the take-up reel stand 5 via the friction material 14 due to the pressing force of the leaf spring 10, so that the gear roller 13 is held on one side 4a of the belt 4.
3 is rotated, the rotational force is transmitted to the take-up reel stand 5 through the friction material 14, and the take-up reel stand 5 is rotated at low speed while slipping to wind up the tape.

Next, when the fast forward button is pressed, the movable plate 17 is moved in the direction of arrow 21, and the movable gear roller 16 is engaged with the gear roller 13 and the take-up reel stand 5. On the other hand, the shaft 18 is also moved together with the movable plate 17, and the shaft 18 escapes from the recess 20 of the leaf spring 10, so that the leaf spring 10 is pushed down and the pressure force between the gear roller 13 and the take-up reel stand 5 is reduced. It is released so that the take-up reel stand 5 can freely rotate. As a result, the rotational force of the motor 1 is transmitted to the take-up reel stand 5 via the one side 4a of the belt 4, the gear roller 13, and the movable gear roller 16, and the rotational force is transmitted to the take-up reel stand 5 during the recording or playback without causing the take-up reel stand 5 to slip. It can be rotated at high speed in the same direction, and the tape can be wound at high speed.

Next, when the rewind button is pressed, the movable plate 17 is moved in the opposite direction of the arrow 21, and the movable gear roller 16 and the rewind reel stand 7 are engaged with each other. At this time, similar to the above, the shaft 18 escapes from the recess 20 of the leaf spring 10, the leaf spring 10 is pushed down, the pressure between the gear roller 13 and the take-up reel stand 5 is released, and the take-up reel stand 5 is released. is rotationally freed. On the other hand, the side 4b of the belt 4 different from the above is fitted into the concave groove 19 of the movable gear roller 16, and the traveling direction of the belt 4 is opposite between the going side and the returning side, and in this case, the belt 4 directly connects to the movable gear roller 16. Since the rotational force is transmitted, the movable gear roller 16 is rotated in a different direction. Since the supply reel stand 7 that meshes with the movable gear roller 16 is also rotated in the opposite direction to the take-up reel stand 5, the tape can be rewound at high speed.

As described above, in the drive device of the tape recorder of the present invention, when the fast forward or rewind button is pressed, the movable plate moves and releases the rotational transmission between the gear roller and the take-up reel stand, while the movable gear roller moves to the left or right. Since the tape is rotated in the same direction, the tape can be rapidly forwarded or rewound without the need for an additional gear roller or the like, and a useful drive device with a simple mechanism can be provided.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a tape recorder drive device of the present invention, and FIG. 2 is a sectional view of the tape recorder drive device of the present invention. 1...Motor, 3...Flywheel, 4...
Belt, 5... Take-up reel stand, 7... Supply reel stand, 10... Leaf spring, 13... Gear roller,
16...Movable gear roller, 17...Movable plate.

Claims (1)

[Scope of utility model registration request] A gear roller fitted to one side of a belt that transmits the rotational force of the motor to the flywheel, a take-up reel stand that is interlocked with the gear roller through frictional force, and a plate that presses the gear roller to the take-up reel stand. It consists of a spring, a movable gear roller mounted on a movable plate and selectively engaged with a different side of the gear roller or belt, and a supply reel stand, and the plate spring is pressed by the movement of the movable plate. A tape recorder characterized in that the pressing force between the gear roller and the take-up reel stand is released, and the rotational force of the movable gear roller rotated in the left or right direction is directly transmitted to the take-up reel stand or the unwind reel stand. Drive device.